Chemical Quantities and Stoichiometry Assessment

Which of the following is the Avogadro's number?

• 6.02 x 10-²³ representative particles of a substance

• 6.02 x 10²³ representative particles of a substance

• 6.02 x 10²³³ representative particles of a substance

• 60.02 x 10²³ representative particles of a substance

Tags

NGSS.HS-PS1-7

This refer the mass of a molecule.

• Molecular mass

• Formula mass

• Atomic mass unit

• gram/mole

Tags

NGSS.HS-PS1-7

Which of the following can be a representative particle?

• atom

• molecule

• formula unit

• all are representative particles

The unit used to describe the mass of an atom

• grams

• milligrams

• atomic mass unit

• nanograms

1 amu is equals to ___________

• 1 amu = 1.8805 x 10-²⁴ g

• 1 amu = 1.6605 x 10²⁴ g

• 1 amu = 16.605 x 10-²⁴ g

• 1 amu = 1.6605 x 10-²⁴ g

A mole (mol) of a substance is equals to ______________

• 6.02 x 10²³ representative particles of that substance.

• 60.02 x 10²³ representative particles of that substance.

• 600.02 x 10²³ representative particles of that substance.

• -6.02 x 10²³ representative particles of that substance.

Tags

NGSS.HS-PS1-7

One mole of carbon: Avogadro's number : particle

• One mole of carbon: contains 6.02 x 10²³ atoms : atoms

• One mole of carbon: contains 6.02 x 10²³ molecules : atoms

• One mole of carbon: contains 6.02 x 10²³ formula units : atoms

• One mole of carbon: contains 6.02 x 10²³ atoms : molecules

How do you abbreviate the unit mole?

• m

• mo

• mol

• ml

Mole can be interpreted as:

• a. mass

• b. number of particle

• c. density

• both a and b

Tags

NGSS.HS-PS1-7

How many hydrogen atoms are in 4 molecules of isopropyl alcohol, C₃H₈O?

• 4 x (6.02 x 10²³)   

• 4   

• 32

• 32 x (6.02 x 10²³)

Tags

NGSS.MS-PS1-1